メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.701192922519 43.0058559504465, 141.701543450743 43.0063695736358, 141.701906361148 43.0069087867603, 141.701685477121 43.006989382305, 141.700927927858 43.0072658768606, 141.700812066646 43.0073092071901, 141.698904828811 43.008015159962, 141.698529301919 43.0074852308337, 141.698177117918 43.0069819287536, 141.697860890653 43.0064983505943, 141.698874621468 43.0061169107817, 141.699825230186 43.0057628695773, 141.700875112249 43.005375819184, 141.701192922519 43.0058559504465)) ^^http://www.opengis.net/ont/geosparql#wktLiteral